I am going to try this on the up coming RX8 P-port engine on
the dyno.
Attached is a chart (DRILL2.TXT) for a linear increase in area
along with the drill diameter necessary to drill that area.
The first column is the area of the hole and the second
column is the drill size.
The idea here as the slides moves more towards WOT
the port area and air flow increase. This requires more
and more fuel. The amount of fuel injected is proportional
to the area of the vertical small hole in the slide.
There fore the fuel holes will get bigger and bigger as
the slide moves more toward WOT. Leaning will
be done by the pressure regulator.
Next step is plot the port opening as a function of slide
travel. Not necessarily linear.
If this works it is a super cheap, low pressure fuel injection.
Very similar to the Ellison throttle body and Posa aircraft carbs.
Paul Lamar ...No rotor no motor.
Paul,
The standby joke in the engine ECU business is that "someday, someone
will invent a system that adds fuel in proportion to air...."
I guess we all know what the answer is.
For the life of me I cannot figure out what all this wool gathering
about some drip feed F.I. system.
I'm sure you are all smart enough to figure out that all of this
hardware, in any point on the matrix of simplicity, cost, and/or
complexity exists already, and at a far higher stage of development
that you'll ever get to even if you spend the rest of your waking
hours on it.
Please find something to do that would be meaningful.
Avoid reinventing everything from some misguided sense of low cost
justification.
I am going to just scream if I see one more hare brained idea on this
supposedly enlightened forum.
Reeves--
You have got to keep the big picture in mind.
We have had less than sterling luck with ECU systems. Aircraft piston engines
have an overwhelming advantage. They will still run after the electrical
system fails. If there was such a thing as a side draft aircraft carburetor
I would use it with the p-ports. The rotary does not lend itself well
to the standard updraft aircraft carb. The Weber 58 MM side draft is nice
but there is no leaning and they are expensive. Perhaps Gordon's carb leaning
scheme will work with the Weber 58 mm side draft.
Timed EFI is over kill for an aircraft engine that runs at a constant
speed and load for hours on end. EFI was primarily developed for smog
reasons and not increased efficiency. Think of the slide throttle
as a variable venturi.
Paul Lamar ...No rotor no motor.
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